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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 6099287 B1

PDFFull Text
Date of Patent:
Aug. 08, 2000

Filed:

Apr. 14, 1998

Stamper protecting layer for optical disk molding apparatus

Applicant:
Inventors:

Takaaki Higashida, Kadoma, JP;

Shinji Kadoriku, Takarazuka, JP;

Hiroshi Yutani, Katano, JP;

Yoshio Maruyama, Kyoto, JP;

Assignee:

Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;

Attorney:

Wenderoth, Lind & Ponack, L.L.P

Primary Examiner:

Harold Pyon

Assistant Examiner:

Emmanuel Luk

Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
425190 ; 425810 ; 425542 ; 425168 ; 264107 ;
Abstract

A stamper protecting layer is interposed between a mold and a stamper of an optical disk molding apparatus, so that forces generated by extension and shrinkage of the stamper in a diametrical direction of the stamper relative to the mold when an optical disk are molded is absorbed by the stamper protecting layer. With this arrangement, the stamper is prevented from being deformed. Accordingly quality and production of the optical disks are improved.

Find Patent Forward Citations

Higashida, Takaaki. (2000). Stamper protecting layer for optical disk molding apparatus (U.S. Patent No. 6099287). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6099287

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